This Week at NASA: InSight Touches Down on Mars and More

Our InSight mission arrives at Mars, announcing the companies that will help us get to the Moon, and the space station's next crew wraps up prelaunch activities ... a few of the stories to tell you about - This Week at NASA.

Our InSight mission arrives at Mars, announcing the companies that will help us get to the Moon, and the space station's next crew wraps up prelaunch activities ... a few of the stories to tell you about - This Week at NASA.